Feature 1Applicable Rails: Base measures standard 114in male thread, recommended for installation on 2225mm (7/81in) vertical, horizontal or oblique rails. 2316 Stainless Steel: Constructed corrosion resistant investment cast 316 stainless steel, has good wear resistance in humid air or high temperature weather. 3With Lever Handle: This ratchet rail antenna base features a lever action handle that makes lowering the antenna quick and easy for passing under trailering. 4Adjustable Ratchet: The antenna base has 2 adjustable ratchets, the upper ratchet can be adjusted to 270 degrees, the lower ratchet can be adjusted to 180 degrees. 5For Marine Use: The VHF antenna mount is suitable for boats, yachts, RVs, etc., it has a compact structure and standard size, which is easy to install and replace.Item Type: Marine VHF Antenna MountProduct Material: 316 stainless steel, mirror polishingThread Diameter: 1inApplicable Rail Diameter: 22-25mm (7/8-1in)Features: The antenna base has 2 adjustable ratchets, the adjustable angle of the upper ratchet is 270 degrees, and the adjustable angle of the lower ratchet is 180 degreesApplications: Boats, yachts, RVs .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Marine VHF Antenna Mount